Dephlegmator



R. E. NAGEL DEPHLEGMATOR Fi1edJan.'9, 1928 Patented Feb. '7, 1933 nnonnnr 'n NAGEL' on CHICAGO; inn'moisf ASSIGNOR' l'ro Umvnnsan on.:enontr'czrs' on cmcaoo, 1 LLrNoi s, A', oonroRa'rIoN on SOUTH-:DAKOTA ppnn'nnncm'ron v j n Applica/19a nieu *I innmy` 9', 192e. seriali1 no..245,388,

Thisfinvention refers to improvements inv dephlegmators and refers',more particularly,

., to' a dephlegmator.' suitable for'use in the'i Y'cracking of sulphurcontaining hydrocarbon' 5 oils.- Inpthe commercial operation of crack-jing plants, great difficulty is experienced inf. the corrosion of thedephle mator orreluX; condensers and particularly1 ln-thelower por# tionof the dephlegmators, i. fe.tliat porti-ont 10 which is in lcontact withthe hottest vaporslj This corrosion *not onlyrv materiallylessenstheflife ofthe'dephlegmatonbut whereftlie-deoperate. .p l sionision the innerfside of the dephlegma'f -tor, the dephlegmator'. may beweakened to` 'sive effect of sulphur containing oils in the cracking ofthe same. To this end, I provide the inner side of the dephlegmator `andgen'- erally it may be sufficient to provide only the lower portion ofthe inner wall of thev de` phlegmatorwith what may 'be termed a floatingliner. This liner is formed of some -metal more able to withstand theeffect of corrosion than the steel 'shell vforming the main body of thedephlegmator; for exam.

ple, the liner may be made of a chromium metalor chromium nickel steelor the like, Thus, inasmuch as the liner will have a differentco-eiiicient of expansion-than the main body of the shell of thedephlegmator, provision must be made for 1permitting its expansionindependent of t e expansion and contraction'of the steel shell itself.,This liner need not he of as great a thickness as the main body of theshe l itself, but it is desirable that provision be made to prevent thevapors from passing between the outer wall of the liner and the .innerwall of the main shell of the dephlegmator. Accordingly, between thetwo, I insert a vapor proof packing in such a way as to prevent anyvapors seeping in between the walls, but 50 without interfering with theindependent `main f-shel'l: ofthe 'cylindrical dep le'gmator provied"with vapor inlet pipe 2, vapor outlet y ,conduit'j and" condensate'draw-ofi pipe 4. phlegmator is under lsubs't'antial";"pressure,' soweakens it as ,tof make it dan erouslto MOIeVr,--n8.SmUCh ist eC'II0.withstandcorrosion, 'as` heretofore stated.

j Thelower 'end lof the liner'is-preferably pro- 'videdjwitha closurecap-6, which ma the danger point vwithout there being anyv exteriorevidence of suchweakening. The.` 20 result has been not only disastrousfires, but' f loss of life. The present invention is 'defsigned toreduce to a minimum Vthecor'rocontractionvandifexpansion v,the shell andlin-er relative to-Ieachother. v InI the' aecompanyingd'rawing, Fig. 1is alvertica'l"seetional1-view ofv a dephlegmator `shellfequjpped withmylinvention and Fig. 2

1s a:hrnizonta'l:v cfross rsectional view 'on line,Referringfto.thedrawing 1 d'esi the vVvVithin the dephlegmatorismounted. a liner 5,:whichjmay,l lie-formed of a-metal able tol be formedas integral with the liner, if desired, and this cap 6, in -turn, has anon-corrosive pipe extension 7'th1'ough which the reiux `condensateasses'. Theliner 5 is preferably vwelded to t e innerwall ot the shellat its 2lowerfend, as shown at 8,but at its upper end free to expand andcontract. In order to insure the upper end of the liner being in fixedposition at all times relative to the cylinder wall, I provide aplurality'of circumferentially disposed holding brackets 9, as shown.The external diameter of the liner is such that it is spaced slightly.away from the dephlegmator wall and in this annular space, I insertasuitable filler, as, for example, a Y plastic iller, for example, apaste of graphite and lead. Also in the space between the bottom plate 6and the lower end of the shell, I insert under pressure a filler ofsimilar paste, as shown at 10. Preferablybetween the upper end of theannular liner and the brackets, I insert asbestos packing, as shown at11. Care should be taken to so force the packing in the annular spacebetween the liner and dephlegmator wall as to insure against leakage ofany' vapors in this space. The vapor nozzle 2 may also be provided witha similar internal liner 12 spaced from the walls of the nozzle and Iinsert between the. inner wall of the ,nozzle and the outer wall of theliner 12 similar packing 13. In order 'zo i so'l ture 14, opposite thenozzle. The end of the I liner 12 must lie flush against the .wall oftheliner 5, so as to form a tight Joint against which the packing 13 may beforced without leakage.

I have shown the invention as applied to a dephlegmator for a crackingplant but, of

course, this same idea may be embodied, for

example, in the expansion chamber, or any other chambers subJect to thecorrosive action of Aoil vapors.

I-claim as my invention:

An apparatus of the character described comprising a chamber, a liner ofnon-corrosive material Within said chamber and spaced from the interiorWall thereof, the lower portion of said liner being fixed to theinterior wall of said chamber and its upper end being free to expand andcontract independently of said chamber, and means for preventin vaporsfrom entering the space between said liner and the interior wall of saidcham- ``R0BERT E. NAGEL.

